I'm not familiar with the Sierra but will try guessing.

It's a mountain, supposedly well known. Except for the pointy high point, it looks a lot like Fremont Peak in the Wind Rivers. That's not much help, because it isn't!

If it's really famous, could it be Mt. Whitney???? A few images I found online look vaguely like the photo, but not enough to match for sure. So this is a wild guess!

Of course we have a mountain up here in the PNW that is only 95 feet lower than Whitney. Being a volcano, however, it is subject to sudden change--which makes it more interesting.